62 lines
2.6 KiB
Java
62 lines
2.6 KiB
Java
package com.baeldung.spring.controller;
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import org.apache.commons.io.IOUtils;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.core.io.Resource;
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import org.springframework.http.*;
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import org.springframework.stereotype.Controller;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RequestMethod;
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import org.springframework.web.bind.annotation.ResponseBody;
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import org.springframework.web.context.support.ServletContextResource;
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import javax.servlet.ServletContext;
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import javax.servlet.http.HttpServletResponse;
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import java.io.IOException;
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import java.io.InputStream;
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@Controller
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public class ImageController {
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@Autowired
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private ServletContext servletContext;
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@RequestMapping(value = "/image-view", method = RequestMethod.GET)
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public String imageView() throws IOException {
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return "image-download";
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}
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@RequestMapping(value = "/image-manual-response", method = RequestMethod.GET)
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public void getImageAsByteArray(HttpServletResponse response) throws IOException {
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final InputStream in = servletContext.getResourceAsStream("/WEB-INF/images/image-example.jpg");
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response.setContentType(MediaType.IMAGE_JPEG_VALUE);
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IOUtils.copy(in, response.getOutputStream());
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}
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@RequestMapping(value = "/image-byte-array", method = RequestMethod.GET)
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@ResponseBody
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public byte[] getImageAsByteArray() throws IOException {
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final InputStream in = servletContext.getResourceAsStream("/WEB-INF/images/image-example.jpg");
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return IOUtils.toByteArray(in);
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}
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@RequestMapping(value = "/image-response-entity", method = RequestMethod.GET)
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public ResponseEntity<byte[]> getImageAsResponseEntity() throws IOException {
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ResponseEntity<byte[]> responseEntity;
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final HttpHeaders headers = new HttpHeaders();
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final InputStream in = servletContext.getResourceAsStream("/WEB-INF/images/image-example.jpg");
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byte[] media = IOUtils.toByteArray(in);
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headers.setCacheControl(CacheControl.noCache().getHeaderValue());
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responseEntity = new ResponseEntity<>(media, headers, HttpStatus.OK);
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return responseEntity;
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}
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@RequestMapping(value = "/image-resource", method = RequestMethod.GET)
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@ResponseBody
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public ResponseEntity<Resource> getImageAsResource() {
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final HttpHeaders headers = new HttpHeaders();
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Resource resource = new ServletContextResource(servletContext, "/WEB-INF/images/image-example.jpg");
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return new ResponseEntity<>(resource, headers, HttpStatus.OK);
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}
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}
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